diff options
author | Jarod Wilson <jarod@redhat.com> | 2010-07-26 20:27:55 -0300 |
---|---|---|
committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-08-02 16:43:21 -0300 |
commit | 9119fddb77bf0d7c1bf6986b3a2c882de6ec2923 (patch) | |
tree | 3ef23d9255b5ce7c536749c8bd5ba4e82fe86616 | |
parent | d10d634143780931f92a265e2aa992428ff1af59 (diff) | |
download | linux-stable-9119fddb77bf0d7c1bf6986b3a2c882de6ec2923.tar.gz linux-stable-9119fddb77bf0d7c1bf6986b3a2c882de6ec2923.tar.bz2 linux-stable-9119fddb77bf0d7c1bf6986b3a2c882de6ec2923.zip |
V4L/DVB: staging/lirc: add lirc_ene0100 driver
[mchehab@redhat.com: fixed a few WARNING: please, no space before tabs]
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
-rw-r--r-- | drivers/staging/lirc/lirc_ene0100.c | 646 | ||||
-rw-r--r-- | drivers/staging/lirc/lirc_ene0100.h | 169 |
2 files changed, 815 insertions, 0 deletions
diff --git a/drivers/staging/lirc/lirc_ene0100.c b/drivers/staging/lirc/lirc_ene0100.c new file mode 100644 index 000000000000..a152c52b0745 --- /dev/null +++ b/drivers/staging/lirc/lirc_ene0100.c @@ -0,0 +1,646 @@ +/* + * driver for ENE KB3926 B/C/D CIR (also known as ENE0100) + * + * Copyright (C) 2009 Maxim Levitsky <maximlevitsky@gmail.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + * USA + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pnp.h> +#include <linux/io.h> +#include <linux/interrupt.h> +#include <linux/sched.h> +#include "lirc_ene0100.h" + +static int sample_period = 75; +static int enable_idle = 1; +static int enable_learning; + +static void ene_set_idle(struct ene_device *dev, int idle); +static void ene_set_inputs(struct ene_device *dev, int enable); + +/* read a hardware register */ +static u8 ene_hw_read_reg(struct ene_device *dev, u16 reg) +{ + outb(reg >> 8, dev->hw_io + ENE_ADDR_HI); + outb(reg & 0xFF, dev->hw_io + ENE_ADDR_LO); + return inb(dev->hw_io + ENE_IO); +} + +/* write a hardware register */ +static void ene_hw_write_reg(struct ene_device *dev, u16 reg, u8 value) +{ + outb(reg >> 8, dev->hw_io + ENE_ADDR_HI); + outb(reg & 0xFF, dev->hw_io + ENE_ADDR_LO); + outb(value, dev->hw_io + ENE_IO); +} + +/* change specific bits in hardware register */ +static void ene_hw_write_reg_mask(struct ene_device *dev, + u16 reg, u8 value, u8 mask) +{ + u8 regvalue; + + outb(reg >> 8, dev->hw_io + ENE_ADDR_HI); + outb(reg & 0xFF, dev->hw_io + ENE_ADDR_LO); + + regvalue = inb(dev->hw_io + ENE_IO) & ~mask; + regvalue |= (value & mask); + outb(regvalue, dev->hw_io + ENE_IO); +} + +/* read irq status and ack it */ +static int ene_hw_irq_status(struct ene_device *dev, int *buffer_pointer) +{ + u8 irq_status; + u8 fw_flags1, fw_flags2; + + fw_flags2 = ene_hw_read_reg(dev, ENE_FW2); + + if (buffer_pointer) + *buffer_pointer = 4 * (fw_flags2 & ENE_FW2_BUF_HIGH); + + if (dev->hw_revision < ENE_HW_C) { + irq_status = ene_hw_read_reg(dev, ENEB_IRQ_STATUS); + + if (!(irq_status & ENEB_IRQ_STATUS_IR)) + return 0; + ene_hw_write_reg(dev, ENEB_IRQ_STATUS, + irq_status & ~ENEB_IRQ_STATUS_IR); + + /* rev B support only recieving */ + return ENE_IRQ_RX; + } + + irq_status = ene_hw_read_reg(dev, ENEC_IRQ); + + if (!(irq_status & ENEC_IRQ_STATUS)) + return 0; + + /* original driver does that twice - a workaround ? */ + ene_hw_write_reg(dev, ENEC_IRQ, irq_status & ~ENEC_IRQ_STATUS); + ene_hw_write_reg(dev, ENEC_IRQ, irq_status & ~ENEC_IRQ_STATUS); + + /* clear unknown flag in F8F9 */ + if (fw_flags2 & ENE_FW2_IRQ_CLR) + ene_hw_write_reg(dev, ENE_FW2, fw_flags2 & ~ENE_FW2_IRQ_CLR); + + /* check if this is a TX interrupt */ + fw_flags1 = ene_hw_read_reg(dev, ENE_FW1); + + if (fw_flags1 & ENE_FW1_TXIRQ) { + ene_hw_write_reg(dev, ENE_FW1, fw_flags1 & ~ENE_FW1_TXIRQ); + return ENE_IRQ_TX; + } else + return ENE_IRQ_RX; +} + +static int ene_hw_detect(struct ene_device *dev) +{ + u8 chip_major, chip_minor; + u8 hw_revision, old_ver; + u8 tmp; + u8 fw_capabilities; + + tmp = ene_hw_read_reg(dev, ENE_HW_UNK); + ene_hw_write_reg(dev, ENE_HW_UNK, tmp & ~ENE_HW_UNK_CLR); + + chip_major = ene_hw_read_reg(dev, ENE_HW_VER_MAJOR); + chip_minor = ene_hw_read_reg(dev, ENE_HW_VER_MINOR); + + ene_hw_write_reg(dev, ENE_HW_UNK, tmp); + hw_revision = ene_hw_read_reg(dev, ENE_HW_VERSION); + old_ver = ene_hw_read_reg(dev, ENE_HW_VER_OLD); + + if (hw_revision == 0xFF) { + + ene_printk(KERN_WARNING, "device seems to be disabled\n"); + ene_printk(KERN_WARNING, + "send a mail to lirc-list@lists.sourceforge.net\n"); + ene_printk(KERN_WARNING, "please attach output of acpidump\n"); + + return -ENODEV; + } + + if (chip_major == 0x33) { + ene_printk(KERN_WARNING, "chips 0x33xx aren't supported yet\n"); + return -ENODEV; + } + + if (chip_major == 0x39 && chip_minor == 0x26 && hw_revision == 0xC0) { + dev->hw_revision = ENE_HW_C; + ene_printk(KERN_WARNING, + "KB3926C detected, driver support is not complete!\n"); + + } else if (old_ver == 0x24 && hw_revision == 0xC0) { + dev->hw_revision = ENE_HW_B; + ene_printk(KERN_NOTICE, "KB3926B detected\n"); + } else { + dev->hw_revision = ENE_HW_D; + ene_printk(KERN_WARNING, + "unknown ENE chip detected, assuming KB3926D\n"); + ene_printk(KERN_WARNING, "driver support incomplete"); + + } + + ene_printk(KERN_DEBUG, "chip is 0x%02x%02x - 0x%02x, 0x%02x\n", + chip_major, chip_minor, old_ver, hw_revision); + + + /* detect features hardware supports */ + + if (dev->hw_revision < ENE_HW_C) + return 0; + + fw_capabilities = ene_hw_read_reg(dev, ENE_FW2); + + dev->hw_gpio40_learning = fw_capabilities & ENE_FW2_GP40_AS_LEARN; + dev->hw_learning_and_tx_capable = fw_capabilities & ENE_FW2_LEARNING; + + dev->hw_fan_as_normal_input = dev->hw_learning_and_tx_capable && + fw_capabilities & ENE_FW2_FAN_AS_NRML_IN; + + ene_printk(KERN_NOTICE, "hardware features:\n"); + ene_printk(KERN_NOTICE, + "learning and tx %s, gpio40_learn %s, fan_in %s\n", + dev->hw_learning_and_tx_capable ? "on" : "off", + dev->hw_gpio40_learning ? "on" : "off", + dev->hw_fan_as_normal_input ? "on" : "off"); + + if (!dev->hw_learning_and_tx_capable && enable_learning) + enable_learning = 0; + + if (dev->hw_learning_and_tx_capable) { + ene_printk(KERN_WARNING, + "Device supports transmitting, but the driver doesn't\n"); + ene_printk(KERN_WARNING, + "due to lack of hardware to test against.\n"); + ene_printk(KERN_WARNING, + "Send a mail to: lirc-list@lists.sourceforge.net\n"); + } + return 0; +} + +/* hardware initialization */ +static int ene_hw_init(void *data) +{ + u8 reg_value; + struct ene_device *dev = (struct ene_device *)data; + dev->in_use = 1; + + if (dev->hw_revision < ENE_HW_C) { + ene_hw_write_reg(dev, ENEB_IRQ, dev->irq << 1); + ene_hw_write_reg(dev, ENEB_IRQ_UNK1, 0x01); + } else { + reg_value = ene_hw_read_reg(dev, ENEC_IRQ) & 0xF0; + reg_value |= ENEC_IRQ_UNK_EN; + reg_value &= ~ENEC_IRQ_STATUS; + reg_value |= (dev->irq & ENEC_IRQ_MASK); + ene_hw_write_reg(dev, ENEC_IRQ, reg_value); + ene_hw_write_reg(dev, ENE_TX_UNK1, 0x63); + } + + ene_hw_write_reg(dev, ENE_CIR_CONF2, 0x00); + ene_set_inputs(dev, enable_learning); + + /* set sampling period */ + ene_hw_write_reg(dev, ENE_CIR_SAMPLE_PERIOD, sample_period); + + /* ack any pending irqs - just in case */ + ene_hw_irq_status(dev, NULL); + + /* enter idle mode */ + ene_set_idle(dev, 1); + + /* enable firmware bits */ + ene_hw_write_reg_mask(dev, ENE_FW1, + ENE_FW1_ENABLE | ENE_FW1_IRQ, + ENE_FW1_ENABLE | ENE_FW1_IRQ); + /* clear stats */ + dev->sample = 0; + return 0; +} + +/* this enables gpio40 signal, used if connected to wide band input*/ +static void ene_enable_gpio40(struct ene_device *dev, int enable) +{ + ene_hw_write_reg_mask(dev, ENE_CIR_CONF1, enable ? + 0 : ENE_CIR_CONF2_GPIO40DIS, + ENE_CIR_CONF2_GPIO40DIS); +} + +/* this enables the classic sampler */ +static void ene_enable_normal_recieve(struct ene_device *dev, int enable) +{ + ene_hw_write_reg(dev, ENE_CIR_CONF1, enable ? ENE_CIR_CONF1_ADC_ON : 0); +} + +/* this enables recieve via fan input */ +static void ene_enable_fan_recieve(struct ene_device *dev, int enable) +{ + if (!enable) + ene_hw_write_reg(dev, ENE_FAN_AS_IN1, 0); + else { + ene_hw_write_reg(dev, ENE_FAN_AS_IN1, ENE_FAN_AS_IN1_EN); + ene_hw_write_reg(dev, ENE_FAN_AS_IN2, ENE_FAN_AS_IN2_EN); + } + dev->fan_input_inuse = enable; +} + +/* determine which input to use*/ +static void ene_set_inputs(struct ene_device *dev, int learning_enable) +{ + ene_enable_normal_recieve(dev, 1); + + /* old hardware doesn't support learning mode for sure */ + if (dev->hw_revision <= ENE_HW_B) + return; + + /* reciever not learning capable, still set gpio40 correctly */ + if (!dev->hw_learning_and_tx_capable) { + ene_enable_gpio40(dev, !dev->hw_gpio40_learning); + return; + } + + /* enable learning mode */ + if (learning_enable) { + ene_enable_gpio40(dev, dev->hw_gpio40_learning); + + /* fan input is not used for learning */ + if (dev->hw_fan_as_normal_input) + ene_enable_fan_recieve(dev, 0); + + /* disable learning mode */ + } else { + if (dev->hw_fan_as_normal_input) { + ene_enable_fan_recieve(dev, 1); + ene_enable_normal_recieve(dev, 0); + } else + ene_enable_gpio40(dev, !dev->hw_gpio40_learning); + } + + /* set few additional settings for this mode */ + ene_hw_write_reg_mask(dev, ENE_CIR_CONF1, learning_enable ? + ENE_CIR_CONF1_LEARN1 : 0, ENE_CIR_CONF1_LEARN1); + + ene_hw_write_reg_mask(dev, ENE_CIR_CONF2, learning_enable ? + ENE_CIR_CONF2_LEARN2 : 0, ENE_CIR_CONF2_LEARN2); +} + +/* deinitialization */ +static void ene_hw_deinit(void *data) +{ + struct ene_device *dev = (struct ene_device *)data; + + /* disable samplers */ + ene_enable_normal_recieve(dev, 0); + + if (dev->hw_fan_as_normal_input) + ene_enable_fan_recieve(dev, 0); + + /* disable hardware IRQ and firmware flag */ + ene_hw_write_reg_mask(dev, ENE_FW1, 0, ENE_FW1_ENABLE | ENE_FW1_IRQ); + + ene_set_idle(dev, 1); + dev->in_use = 0; +} + +/* sends current sample to userspace */ +static void send_sample(struct ene_device *dev) +{ + int value = abs(dev->sample) & PULSE_MASK; + + if (dev->sample > 0) + value |= PULSE_BIT; + + if (!lirc_buffer_full(dev->lirc_driver->rbuf)) { + lirc_buffer_write(dev->lirc_driver->rbuf, (void *)&value); + wake_up(&dev->lirc_driver->rbuf->wait_poll); + } + dev->sample = 0; +} + +/* this updates current sample */ +static void update_sample(struct ene_device *dev, int sample) +{ + if (!dev->sample) + dev->sample = sample; + else if (same_sign(dev->sample, sample)) + dev->sample += sample; + else { + send_sample(dev); + dev->sample = sample; + } +} + +/* enable or disable idle mode */ +static void ene_set_idle(struct ene_device *dev, int idle) +{ + struct timeval now; + int disable = idle && enable_idle && (dev->hw_revision < ENE_HW_C); + + ene_hw_write_reg_mask(dev, ENE_CIR_SAMPLE_PERIOD, + disable ? 0 : ENE_CIR_SAMPLE_OVERFLOW, + ENE_CIR_SAMPLE_OVERFLOW); + dev->idle = idle; + + /* remember when we have entered the idle mode */ + if (idle) { + do_gettimeofday(&dev->gap_start); + return; + } + + /* send the gap between keypresses now */ + do_gettimeofday(&now); + + if (now.tv_sec - dev->gap_start.tv_sec > 16) + dev->sample = space(PULSE_MASK); + else + dev->sample = dev->sample + + space(1000000ull * (now.tv_sec - dev->gap_start.tv_sec)) + + space(now.tv_usec - dev->gap_start.tv_usec); + + if (abs(dev->sample) > PULSE_MASK) + dev->sample = space(PULSE_MASK); + send_sample(dev); +} + +/* interrupt handler */ +static irqreturn_t ene_hw_irq(int irq, void *data) +{ + u16 hw_value; + int i, hw_sample; + int space; + int buffer_pointer; + int irq_status; + + struct ene_device *dev = (struct ene_device *)data; + irq_status = ene_hw_irq_status(dev, &buffer_pointer); + + if (!irq_status) + return IRQ_NONE; + + /* TODO: only RX for now */ + if (irq_status == ENE_IRQ_TX) + return IRQ_HANDLED; + + for (i = 0; i < ENE_SAMPLES_SIZE; i++) { + + hw_value = ene_hw_read_reg(dev, + ENE_SAMPLE_BUFFER + buffer_pointer + i); + + if (dev->fan_input_inuse) { + /* read high part of the sample */ + hw_value |= ene_hw_read_reg(dev, + ENE_SAMPLE_BUFFER_FAN + buffer_pointer + i) << 8; + + /* test for _space_ bit */ + space = !(hw_value & ENE_FAN_SMPL_PULS_MSK); + + /* clear space bit, and other unused bits */ + hw_value &= ENE_FAN_VALUE_MASK; + hw_sample = hw_value * ENE_SAMPLE_PERIOD_FAN; + + } else { + space = hw_value & ENE_SAMPLE_SPC_MASK; + hw_value &= ENE_SAMPLE_VALUE_MASK; + hw_sample = hw_value * sample_period; + } + + /* no more data */ + if (!(hw_value)) + break; + + if (space) + hw_sample *= -1; + + /* overflow sample recieved, handle it */ + + if (!dev->fan_input_inuse && hw_value == ENE_SAMPLE_OVERFLOW) { + + if (dev->idle) + continue; + + if (dev->sample > 0 || abs(dev->sample) <= ENE_MAXGAP) + update_sample(dev, hw_sample); + else + ene_set_idle(dev, 1); + + continue; + } + + /* normal first sample recieved */ + if (!dev->fan_input_inuse && dev->idle) { + ene_set_idle(dev, 0); + + /* discard first recieved value, its random + since its the time signal was off before + first pulse if idle mode is enabled, HW + does that for us */ + + if (!enable_idle) + continue; + } + update_sample(dev, hw_sample); + send_sample(dev); + } + return IRQ_HANDLED; +} + +static int ene_probe(struct pnp_dev *pnp_dev, + const struct pnp_device_id *dev_id) +{ + struct ene_device *dev; + struct lirc_driver *lirc_driver; + int error = -ENOMEM; + + dev = kzalloc(sizeof(struct ene_device), GFP_KERNEL); + + if (!dev) + goto err1; + + dev->pnp_dev = pnp_dev; + pnp_set_drvdata(pnp_dev, dev); + + + /* prepare lirc interface */ + error = -ENOMEM; + lirc_driver = kzalloc(sizeof(struct lirc_driver), GFP_KERNEL); + + if (!lirc_driver) + goto err2; + + dev->lirc_driver = lirc_driver; + + strcpy(lirc_driver->name, ENE_DRIVER_NAME); + lirc_driver->minor = -1; + lirc_driver->code_length = sizeof(int) * 8; + lirc_driver->features = LIRC_CAN_REC_MODE2; + lirc_driver->data = dev; + lirc_driver->set_use_inc = ene_hw_init; + lirc_driver->set_use_dec = ene_hw_deinit; + lirc_driver->dev = &pnp_dev->dev; + lirc_driver->owner = THIS_MODULE; + + lirc_driver->rbuf = kzalloc(sizeof(struct lirc_buffer), GFP_KERNEL); + + if (!lirc_driver->rbuf) + goto err3; + + if (lirc_buffer_init(lirc_driver->rbuf, sizeof(int), sizeof(int) * 256)) + goto err4; + + error = -ENODEV; + if (lirc_register_driver(lirc_driver)) + goto err5; + + /* validate resources */ + if (!pnp_port_valid(pnp_dev, 0) || + pnp_port_len(pnp_dev, 0) < ENE_MAX_IO) + goto err6; + + if (!pnp_irq_valid(pnp_dev, 0)) + goto err6; + + dev->hw_io = pnp_port_start(pnp_dev, 0); + dev->irq = pnp_irq(pnp_dev, 0); + + /* claim the resources */ + error = -EBUSY; + if (!request_region(dev->hw_io, ENE_MAX_IO, ENE_DRIVER_NAME)) + goto err6; + + if (request_irq(dev->irq, ene_hw_irq, + IRQF_SHARED, ENE_DRIVER_NAME, (void *)dev)) + goto err7; + + /* detect hardware version and features */ + error = ene_hw_detect(dev); + if (error) + goto err8; + + ene_printk(KERN_NOTICE, "driver has been succesfully loaded\n"); + return 0; + +err8: + free_irq(dev->irq, dev); +err7: + release_region(dev->hw_io, ENE_MAX_IO); +err6: + lirc_unregister_driver(lirc_driver->minor); +err5: + lirc_buffer_free(lirc_driver->rbuf); +err4: + kfree(lirc_driver->rbuf); +err3: + kfree(lirc_driver); +err2: + kfree(dev); +err1: + return error; +} + +static void ene_remove(struct pnp_dev *pnp_dev) +{ + struct ene_device *dev = pnp_get_drvdata(pnp_dev); + ene_hw_deinit(dev); + free_irq(dev->irq, dev); + release_region(dev->hw_io, ENE_MAX_IO); + lirc_unregister_driver(dev->lirc_driver->minor); + lirc_buffer_free(dev->lirc_driver->rbuf); + kfree(dev->lirc_driver); + kfree(dev); +} + +#ifdef CONFIG_PM + +/* TODO: make 'wake on IR' configurable and add .shutdown */ +/* currently impossible due to lack of kernel support */ + +static int ene_suspend(struct pnp_dev *pnp_dev, pm_message_t state) +{ + struct ene_device *dev = pnp_get_drvdata(pnp_dev); + ene_hw_write_reg_mask(dev, ENE_FW1, ENE_FW1_WAKE, ENE_FW1_WAKE); + return 0; +} + +static int ene_resume(struct pnp_dev *pnp_dev) +{ + struct ene_device *dev = pnp_get_drvdata(pnp_dev); + if (dev->in_use) + ene_hw_init(dev); + + ene_hw_write_reg_mask(dev, ENE_FW1, 0, ENE_FW1_WAKE); + return 0; +} + +#endif + +static const struct pnp_device_id ene_ids[] = { + {.id = "ENE0100",}, + {}, +}; + +static struct pnp_driver ene_driver = { + .name = ENE_DRIVER_NAME, + .id_table = ene_ids, + .flags = PNP_DRIVER_RES_DO_NOT_CHANGE, + + .probe = ene_probe, + .remove = __devexit_p(ene_remove), + +#ifdef CONFIG_PM + .suspend = ene_suspend, + .resume = ene_resume, +#endif +}; + +static int __init ene_init(void) +{ + if (sample_period < 5) { + ene_printk(KERN_ERR, "sample period must be at\n"); + ene_printk(KERN_ERR, "least 5 us, (at least 30 recommended)\n"); + return -EINVAL; + } + return pnp_register_driver(&ene_driver); +} + +static void ene_exit(void) +{ + pnp_unregister_driver(&ene_driver); +} + +module_param(sample_period, int, S_IRUGO); +MODULE_PARM_DESC(sample_period, "Hardware sample period (75 us default)"); + +module_param(enable_idle, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(enable_idle, + "Enables turning off signal sampling after long inactivity time; " + "if disabled might help detecting input signal (default: enabled)"); + +module_param(enable_learning, bool, S_IRUGO); +MODULE_PARM_DESC(enable_learning, "Use wide band (learning) reciever"); + +MODULE_DEVICE_TABLE(pnp, ene_ids); +MODULE_DESCRIPTION + ("LIRC driver for KB3926B/KB3926C/KB3926D (aka ENE0100) CIR port"); +MODULE_AUTHOR("Maxim Levitsky"); +MODULE_LICENSE("GPL"); + +module_init(ene_init); +module_exit(ene_exit); diff --git a/drivers/staging/lirc/lirc_ene0100.h b/drivers/staging/lirc/lirc_ene0100.h new file mode 100644 index 000000000000..776b693bb307 --- /dev/null +++ b/drivers/staging/lirc/lirc_ene0100.h @@ -0,0 +1,169 @@ +/* + * driver for ENE KB3926 B/C/D CIR (also known as ENE0100) + * + * Copyright (C) 2009 Maxim Levitsky <maximlevitsky@gmail.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + * USA + */ + +#include <media/lirc.h> +#include <media/lirc_dev.h> + +/* hardware address */ +#define ENE_STATUS 0 /* hardware status - unused */ +#define ENE_ADDR_HI 1 /* hi byte of register address */ +#define ENE_ADDR_LO 2 /* low byte of register address */ +#define ENE_IO 3 /* read/write window */ +#define ENE_MAX_IO 4 + +/* 8 bytes of samples, divided in 2 halfs*/ +#define ENE_SAMPLE_BUFFER 0xF8F0 /* regular sample buffer */ +#define ENE_SAMPLE_SPC_MASK (1 << 7) /* sample is space */ +#define ENE_SAMPLE_VALUE_MASK 0x7F +#define ENE_SAMPLE_OVERFLOW 0x7F +#define ENE_SAMPLES_SIZE 4 + +/* fan input sample buffer */ +#define ENE_SAMPLE_BUFFER_FAN 0xF8FB /* this buffer holds high byte of */ + /* each sample of normal buffer */ + +#define ENE_FAN_SMPL_PULS_MSK 0x8000 /* this bit of combined sample */ + /* if set, says that sample is pulse */ +#define ENE_FAN_VALUE_MASK 0x0FFF /* mask for valid bits of the value */ + +/* first firmware register */ +#define ENE_FW1 0xF8F8 +#define ENE_FW1_ENABLE (1 << 0) /* enable fw processing */ +#define ENE_FW1_TXIRQ (1 << 1) /* TX interrupt pending */ +#define ENE_FW1_WAKE (1 << 6) /* enable wake from S3 */ +#define ENE_FW1_IRQ (1 << 7) /* enable interrupt */ + +/* second firmware register */ +#define ENE_FW2 0xF8F9 +#define ENE_FW2_BUF_HIGH (1 << 0) /* which half of the buffer to read */ +#define ENE_FW2_IRQ_CLR (1 << 2) /* clear this on IRQ */ +#define ENE_FW2_GP40_AS_LEARN (1 << 4) /* normal input is used as */ + /* learning input */ +#define ENE_FW2_FAN_AS_NRML_IN (1 << 6) /* fan is used as normal input */ +#define ENE_FW2_LEARNING (1 << 7) /* hardware supports learning and TX */ + +/* fan as input settings - only if learning capable */ +#define ENE_FAN_AS_IN1 0xFE30 /* fan init reg 1 */ +#define ENE_FAN_AS_IN1_EN 0xCD +#define ENE_FAN_AS_IN2 0xFE31 /* fan init reg 2 */ +#define ENE_FAN_AS_IN2_EN 0x03 +#define ENE_SAMPLE_PERIOD_FAN 61 /* fan input has fixed sample period */ + +/* IRQ registers block (for revision B) */ +#define ENEB_IRQ 0xFD09 /* IRQ number */ +#define ENEB_IRQ_UNK1 0xFD17 /* unknown setting = 1 */ +#define ENEB_IRQ_STATUS 0xFD80 /* irq status */ +#define ENEB_IRQ_STATUS_IR (1 << 5) /* IR irq */ + +/* IRQ registers block (for revision C,D) */ +#define ENEC_IRQ 0xFE9B /* new irq settings register */ +#define ENEC_IRQ_MASK 0x0F /* irq number mask */ +#define ENEC_IRQ_UNK_EN (1 << 4) /* always enabled */ +#define ENEC_IRQ_STATUS (1 << 5) /* irq status and ACK */ + +/* CIR block settings */ +#define ENE_CIR_CONF1 0xFEC0 +#define ENE_CIR_CONF1_ADC_ON 0x7 /* reciever on gpio40 enabled */ +#define ENE_CIR_CONF1_LEARN1 (1 << 3) /* enabled on learning mode */ +#define ENE_CIR_CONF1_TX_ON 0x30 /* enabled on transmit */ +#define ENE_CIR_CONF1_TX_CARR (1 << 7) /* send TX carrier or not */ + +#define ENE_CIR_CONF2 0xFEC1 /* unknown setting = 0 */ +#define ENE_CIR_CONF2_LEARN2 (1 << 4) /* set on enable learning */ +#define ENE_CIR_CONF2_GPIO40DIS (1 << 5) /* disable normal input via gpio40 */ + +#define ENE_CIR_SAMPLE_PERIOD 0xFEC8 /* sample period in us */ +#define ENE_CIR_SAMPLE_OVERFLOW (1 << 7) /* interrupt on overflows if set */ + + +/* transmitter - not implemented yet */ +/* KB3926C and higher */ +/* transmission is very similiar to recieving, a byte is written to */ +/* ENE_TX_INPUT, in same manner as it is read from sample buffer */ +/* sample period is fixed*/ + + +/* transmitter ports */ +#define ENE_TX_PORT1 0xFC01 /* this enables one or both */ +#define ENE_TX_PORT1_EN (1 << 5) /* TX ports */ +#define ENE_TX_PORT2 0xFC08 +#define ENE_TX_PORT2_EN (1 << 1) + +#define ENE_TX_INPUT 0xFEC9 /* next byte to transmit */ +#define ENE_TX_SPC_MASK (1 << 7) /* Transmitted sample is space */ +#define ENE_TX_UNK1 0xFECB /* set to 0x63 */ +#define ENE_TX_SMPL_PERIOD 50 /* transmit sample period */ + + +#define ENE_TX_CARRIER 0xFECE /* TX carrier * 2 (khz) */ +#define ENE_TX_CARRIER_UNKBIT 0x80 /* This bit set on transmit */ +#define ENE_TX_CARRIER_LOW 0xFECF /* TX carrier / 2 */ + +/* Hardware versions */ +#define ENE_HW_VERSION 0xFF00 /* hardware revision */ +#define ENE_HW_UNK 0xFF1D +#define ENE_HW_UNK_CLR (1 << 2) +#define ENE_HW_VER_MAJOR 0xFF1E /* chip version */ +#define ENE_HW_VER_MINOR 0xFF1F +#define ENE_HW_VER_OLD 0xFD00 + +#define same_sign(a, b) ((((a) > 0) && (b) > 0) || ((a) < 0 && (b) < 0)) + +#define ENE_DRIVER_NAME "enecir" +#define ENE_MAXGAP 250000 /* this is amount of time we wait + before turning the sampler, chosen + arbitry */ + +#define space(len) (-(len)) /* add a space */ + +/* software defines */ +#define ENE_IRQ_RX 1 +#define ENE_IRQ_TX 2 + +#define ENE_HW_B 1 /* 3926B */ +#define ENE_HW_C 2 /* 3926C */ +#define ENE_HW_D 3 /* 3926D */ + +#define ene_printk(level, text, ...) \ + printk(level ENE_DRIVER_NAME ": " text, ## __VA_ARGS__) + +struct ene_device { + struct pnp_dev *pnp_dev; + struct lirc_driver *lirc_driver; + + /* hw settings */ + unsigned long hw_io; + int irq; + + int hw_revision; /* hardware revision */ + int hw_learning_and_tx_capable; /* learning capable */ + int hw_gpio40_learning; /* gpio40 is learning */ + int hw_fan_as_normal_input; /* fan input is used as regular input */ + + /* device data */ + int idle; + int fan_input_inuse; + + int sample; + int in_use; + + struct timeval gap_start; +}; |